CN216032275U

CN216032275U - Secondary demolding mechanism of injection mold

Info

Publication number: CN216032275U
Application number: CN202122572603.7U
Authority: CN
Inventors: 胡军强; 王荣
Original assignee: Huizhou Guangda Precision Die Co ltd
Current assignee: Huizhou Guangda Precision Die Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-03-15
Anticipated expiration: 2031-10-25

Abstract

The utility model relates to the technical field of injection molds, in particular to a secondary demolding mechanism of an injection mold, which comprises a bottom mold and an upper mold, wherein a connecting hole is formed in the bottom mold, a first hydraulic telescopic rod is fixedly connected to the inside of the connecting hole, one end, which is not in contact with the connecting hole, of the first hydraulic telescopic rod is fixedly connected to the lower surface of the upper mold, an injection molding hole is formed in the upper mold, a molding cavity is formed in the upper surface of the bottom mold, an inner column is fixedly connected to the inside of the molding cavity, and a demolding mechanism is arranged on the upper mold. According to the utility model, when the two connecting blocks are completely separated from the inside of the forming cavity, the spring contracts to drive the two connecting blocks to move back and forth, so that the two stripping plates move back and forth, and the reverse buckle of the formed workpiece is separated from the inside of the reverse buckle groove, so that the formed workpiece falls down from between the two stripping plates, and further secondary demoulding of the workpiece with the reverse buckle is realized, and therefore, the workpiece is not required to be forcibly ejected.

Description

Secondary demolding mechanism of injection mold

Technical Field

The application relates to the technical field of injection molds, in particular to a secondary demolding mechanism of an injection mold.

Background

Two-step demoulding, also called secondary ejection, because of the special shape of the plastic part or the requirement of production automation, after the one-step demoulding action is finished, the plastic part is still difficult to take out from the cavity or can not automatically fall off, at this moment, the one-step demoulding action must be added to make the plastic part fall off, and the secondary demoulding in factories is also adopted to avoid the overlarge stress of the one-step demoulding plastic part, such as thin-wall deep-cavity plastic parts or products with complex shapes, such as the plastic part is easy to break or deform after the one-step ejection, and the secondary demoulding is adopted to disperse the demoulding force and ensure the product quality;

as disclosed in the chinese patent: the utility model provides a full-automatic ejecting mould of flexible glue back-off product, publication no: the patent of CN201620323410.4 solves the problem of producing soft rubber products by using a mold in the prior art by matching the structures of a rear mold, an outer push plate, a flange, an accommodating cavity, an upper inner wall, a lower inner wall and the like, particularly, when the soft rubber product with the inverted buckle structure is ejected, the inverted buckle of the soft rubber product is forcibly separated from the top plate by a hand so as to take away the soft rubber product, because uneven force application can cause product deformation and affect the assembly effect of the product, but in the technical scheme, the formed workpiece is separated from the mold through ejection, but the produced workpiece has an inverted buckle, even if the injection-molded workpiece is made of soft material, when the workpiece is ejected forcibly, the workpiece is damaged due to the limitation of the reverse buckle in the ejection process, therefore, the production yield is reduced, and the phenomena of breakage and abrasion of the workpiece are easily caused, so that the injection molding raw material is wasted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a secondary demolding mechanism of an injection mold, which aims to solve the problems in the background technology.

The embodiment of the application adopts the following technical scheme:

the utility model provides an injection mold secondary demoulding mechanism, includes die block and last mould, the connecting hole has been seted up on the die block, the first hydraulic telescoping rod of inside fixedly connected with of connecting hole, first hydraulic telescoping rod do not have the one end fixed connection of connecting hole contact on the lower surface of last mould, have seted up the hole of moulding plastics on going up the mould, and the upper surface of die block has seted up into the die cavity, becomes the inside fixedly connected with inner prop in die cavity, goes up and is provided with demoulding mechanism on the mould.

Preferably, become the inner wall upper end in die cavity and be the arc, become the inside bottom surface in die cavity and seted up two auxiliary tanks, the equal fixedly connected with second hydraulic stretching pole in inside of auxiliary tank, the equal fixedly connected with sliding connection in upper end of second hydraulic stretching pole is at the inside auxiliary block in die cavity, has all seted up logical groove on the auxiliary block, the both ends of two auxiliary blocks laminate with die cavity and inner prop respectively.

Preferably, demoulding mechanism includes that two settings are at two connecting blocks that are handstand L shape of last mould bottom surface, two sliding trays have been seted up to the bottom surface of last mould, the holding tank has all been seted up on the inner wall of sliding tray, the equal fixedly connected with spring in inside of holding tank, the spring is fixed connection respectively on the diaphragm of two connecting blocks with the one end of holding tank contact, the equal sliding connection in inside of holding tank of diaphragm of two connecting blocks, the shifting chute has all been seted up to one side that two connecting blocks are relative, the equal fixedly connected with extension spring in inside of shifting chute, the extension spring is not at the equal fixedly connected with sliding connection of one end of shifting chute contact at the inside movable block of shifting chute, equal fixedly connected with stripper on one side that two movable blocks are relative, the back-off groove has all been seted up on one side that two stripper are relative, the moving chute is horizontal T font with the movable block, stripper is the inclined plane with the lower extreme of connecting block.

The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:

first, when the workpiece is formed, the first hydraulic telescopic rod and the second hydraulic telescopic rod are started, so that the first hydraulic telescopic rod drives the upper die to move upwards, the upper die is separated from the bottom die, at the same time, the movement of the upper die drives the connecting block and the demoulding plate and the formed workpiece to be separated from the inside of the forming cavity, at the same time, the workpiece cannot be separated from the two demoulding plates due to the fact that the workpiece is provided with the back-off, the workpiece only moves along with the demoulding plate, at the same time, the second hydraulic telescopic rod can lift the formed workpiece to be separated from the inside of the forming cavity, and further, when the two connecting blocks are completely separated from the inside of the forming cavity, the spring contracts to drive the two connecting blocks to move back and back, so that the two demoulding plates move back and back, at the same time, the back-off of the formed workpiece is separated from the inside of the back-off groove, and therefore, the formed workpiece falls down from the two demoulding plates, the workpiece with the reverse buckle is subjected to secondary demolding, so that the workpiece is not required to be forcibly ejected, and further the workpiece is prevented from being damaged and broken after being forcibly ejected after being formed, so that the finished product yield of the workpiece is improved, and meanwhile, the workpiece is not required to be subjected to secondary demolding manually, so that the demolding efficiency is improved, and meanwhile, the yield of the workpiece after demolding is ensured, so that the waste of raw materials is reduced, and meanwhile, the production yield is ensured;

secondly, when workpieces with reversed buckles and different lengths need to be injected, a second hydraulic telescopic rod is started, the second hydraulic telescopic rod drives an auxiliary block to move, so that the height between the auxiliary block and an inner column is changed, the length of the workpiece is shortened, and when two connecting blocks move to the inside of a forming cavity again, the connecting blocks continue to move downwards after penetrating through the through grooves along with the downward movement of the connecting blocks, so that the demoulding plate is blocked by the auxiliary block to drive the moving block to slide upwards in the moving grooves, so that the positions of the reversed buckles and the auxiliary block keep the same distance all the time, the mould can be used for injecting the workpieces with different lengths, the adaptability of the mould is improved, the time wasted by changing the mould by an operator is reduced, the working efficiency is improved, and the labor intensity of the operator is reduced at the same time, and to reduce the cost expenditure required to purchase different molds.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic structural view of a secondary demolding mechanism of an injection mold according to the present invention;

FIG. 2 is a schematic structural view of a first hydraulic telescopic rod of the present invention;

FIG. 3 is a schematic front view of the upper mold and the bottom mold of the present invention;

fig. 4 is a schematic structural view of the connecting block of the present invention.

In the figure: the mould comprises a bottom mould 1, an upper mould 2, a sliding groove 201, a 202 accommodating groove, an injection molding hole 203, a 3 connecting hole, a first hydraulic telescopic rod 301, a 4 connecting block, a 401 spring, a 402 moving groove, a 403 tension spring, a 404 moving block, a 405 demoulding plate, a 406 reversing groove, a 5 forming cavity, a 501 inner column, a 502 auxiliary block, a 503 through groove, a 504 second hydraulic telescopic rod and a 505 auxiliary groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Example 1: referring to fig. 1-3, a secondary demolding mechanism for an injection mold comprises a bottom mold 1 and an upper mold 2, wherein the bottom mold 1 is provided with a connecting hole 3, the inside of the connecting hole 3 is fixedly connected with a first hydraulic telescopic rod 301, one end of the first hydraulic telescopic rod 301, which is not in contact with the connecting hole 3, is fixedly connected to the lower surface of the upper mold 2, the upper mold 2 is provided with an injection molding hole 203, the upper surface of the bottom mold 1 is provided with a molding cavity 5, the inside of the molding cavity 5 is fixedly connected with an inner column 501, and the upper mold 2 is provided with a demolding mechanism.

When using, through setting up the hole 203 of moulding plastics on last mould 2, consequently when the work piece is moulded plastics to needs, start first hydraulic telescoping rod 301, make its output contract, and then drive and go up mould 2 and the laminating of die block 1, will mould plastics the inside of liquid injection molding cavity 5 through the hole 203 of moulding plastics, make the liquid of moulding plastics stereotype through the shaping cavity 5, after the work piece shaping finishes, carry out quick drawing of patterns to it through demoulding mechanism, and then accomplish the moulding plastics and the drawing of patterns to the work piece.

Further, the inner wall upper end that becomes die cavity 5 is the arc, and two auxiliary tanks 505 have been seted up to the inside bottom surface that becomes die cavity 5, the equal fixedly connected with second hydraulic stretching pole 504 in inside of auxiliary tank 505, the equal fixedly connected with sliding connection in the auxiliary block 502 that becomes die cavity 5 inside of upper end of second hydraulic stretching pole 504, has all seted up logical groove 503 on the auxiliary block 502, the both ends of two auxiliary blocks 502 laminate with become die cavity 5 and inner prop 501 respectively.

The first hydraulic telescopic rod 301 and the second hydraulic telescopic rod 504 are both conventional structures and are not described herein in detail.

Through the second hydraulic stretching pole 504 that sets up, consequently when the work piece of different length of moulding plastics, the flexible of second hydraulic stretching pole 504 can drive supplementary piece 502 and slide from top to bottom in the inside of shaping chamber 5, consequently makes the upper and lower position of supplementary piece 502 and interior post 501 highly change, consequently makes this injection mold can mould plastics the work piece of different length.

Example 2: referring to fig. 3-4, on the basis of the first embodiment, the demolding mechanism includes two inverted L-shaped connecting blocks 4 disposed on the bottom surface of the upper mold 2, two sliding grooves 201 are disposed on the bottom surface of the upper mold 2, the inner walls of the sliding grooves 201 are both provided with accommodating grooves 202, springs 401 are all fixedly connected inside the accommodating grooves 202, ends of the springs 401, which are not in contact with the accommodating grooves 202, are respectively and fixedly connected to transverse plates of the two connecting blocks 4, the transverse plates of the two connecting blocks 4 are all and slidably connected inside the accommodating grooves 202, moving grooves 402 are both disposed on opposite sides of the two connecting blocks 4, tension springs 403 are all and fixedly connected inside the moving grooves 402, ends of the tension springs 403, which are not in contact with the moving grooves 402, are all and fixedly connected to moving blocks 404 inside the moving grooves 402, demolding plates 405 are all and inverted buckle grooves 406 are disposed on opposite sides of the two demolding plates 405.

Further, the moving groove 402 and the moving block 404 are both laterally T-shaped, and the lower ends of the stripper plate 405 and the connecting block 4 are both inclined surfaces.

When the injection molding device is used, through the arranged stripping plate 405, when the upper die 2 moves downwards, the inclined surfaces of the connecting blocks 4 and the stripping plate 405 are in contact with the arc-shaped upper end surface of the molding cavity 5, so that the two connecting blocks 4 are forced to move relatively inside the accommodating groove 202 along with the downward movement of the upper die 2, the spring 401 stretches, so that the lower ends of the stripping plate 405 and the connecting blocks 4 are attached to the upper surface of the auxiliary block 502 along with the downward movement of the upper die 2, injection molding liquid is injected into the molding cavity 5 through the injection molding hole 203, the injection molding liquid is molded inside the molding cavity 5, and meanwhile, the injection molding liquid forms the inverted connecting lug through the inverted groove 406.

When a workpiece is formed, the first hydraulic telescopic rod 301 and the second hydraulic telescopic rod 504 are started, so that the first hydraulic telescopic rod 301 drives the upper die 2 to move upwards, so that the upper die 2 is separated from the bottom die 1, at the same time, the movement of the upper die 2 drives the connecting block 4 and the stripper plate 405 as well as the formed workpiece to be separated from the inside of the forming cavity 5, at the same time, the workpiece is not separated from the two stripper plates 405 due to the back-off, but only moves along with the stripper plate 405, at the same time, the formed workpiece can be lifted by starting the second hydraulic telescopic rod 504, so that the workpiece is separated from the inside of the forming cavity 5, and further, when the two connecting blocks 4 are completely separated from the inside of the forming cavity 5, the spring 401 contracts to drive the two connecting blocks 4 to move back to back, so that the two stripper plates 405 move back to back, at the moment, the back-off of the formed workpiece is separated from the inside of the back-off groove 406, therefore, the formed workpiece falls off between the two stripping plates 405, and secondary demolding of the workpiece with the reverse buckle is achieved, so that the workpiece is not required to be ejected forcibly, and further the workpiece is prevented from being damaged and broken after being ejected forcibly after being formed, so that the finished product yield of the workpiece is improved, and meanwhile, secondary demolding is not required to be performed manually, so that demolding efficiency is improved, the yield of the workpiece after demolding is ensured, waste of raw materials is reduced, and production yield is ensured.

When workpieces with reversed buckles and different lengths need to be injection-molded, the second hydraulic telescopic rod 504 is started, the second hydraulic telescopic rod 504 drives the auxiliary block 502 to move, so that the height between the auxiliary block and the inner column 501 is changed, the length of the workpieces is shortened, and when two connecting blocks 4 move to the inside of the molding cavity 5 again, along with the downward movement of the connecting blocks 4, the connecting blocks 4 continue to move downwards after penetrating through the through grooves 504, so that the stripping plate 405 is blocked by the auxiliary block 502 to drive the moving block 404 to slide upwards in the moving groove 402, so that the position of the reversed buckle groove 406 always keeps the same distance with the auxiliary block 502, the mold can be used for injection-molding of workpieces with different lengths, the adaptive performance of the mold is improved, the time wasted by an operator for replacing the mold is reduced, and the working efficiency is improved, simultaneously, the labor intensity of operators is reduced, and the cost for purchasing different molds is reduced.

According to the working principle, through the arranged stripping plate 405, when the upper die 2 moves downwards, the inclined surfaces of the connecting blocks 4 and the stripping plate 405 are in contact with the arc-shaped surface of the upper end of the forming cavity 5, so that the two connecting blocks 4 are forced to move relatively in the accommodating groove 202 along with the downward movement of the upper die 2, the spring 401 is stretched, and therefore, along with the continuous downward movement of the upper die 2, the lower ends of the stripping plate 405 and the connecting blocks 4 are attached to the upper surface of the auxiliary block 502, so that the injection liquid is injected into the forming cavity 5 through the injection hole 203, the injection liquid is formed in the forming cavity 5, and meanwhile, the injection liquid forms the inverted buckle connection lug through the inverted buckle groove 406;

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. The utility model provides an injection mold secondary demoulding mechanism, includes die block (1) and last mould (2), its characterized in that: a connecting hole (3) is formed in the bottom die (1), a first hydraulic telescopic rod (301) is fixedly connected to the inside of the connecting hole (3), and one end, which is not contacted with the connecting hole (3), of the first hydraulic telescopic rod (301) is fixedly connected to the lower surface of the upper die (2);

an injection molding hole (203) is formed in the upper die (2), and a molding cavity (5) is formed in the upper surface of the bottom die (1);

an inner column (501) is fixedly connected inside the molding cavity (5), and a demoulding mechanism is arranged on the upper die (2).

2. The secondary demolding mechanism of an injection mold according to claim 1, characterized in that: the inner wall upper end that becomes die cavity (5) is the arc, and two auxiliary groove (505) have been seted up to the inside bottom surface that becomes die cavity (5), the equal fixedly connected with second hydraulic stretching pole (504) in inside of auxiliary groove (505), the equal fixedly connected with sliding connection in auxiliary block (502) that becomes die cavity (5) inside of upper end of second hydraulic stretching pole (504).

3. The secondary demolding mechanism of an injection mold according to claim 2, characterized in that: all seted up logical groove (503) on supplementary piece (502), the both ends of two supplementary pieces (502) are laminated with shaping chamber (5) and inner prop (501) respectively.

4. The secondary demolding mechanism of an injection mold according to claim 1, characterized in that: demoulding mechanism is including setting up connecting block (4) for handstand L shape two of last mould (2) bottom surface, two sliding tray (201) have been seted up to the bottom surface of last mould (2), holding tank (202) have all been seted up on the inner wall of sliding tray (201), the equal fixedly connected with spring (401) in inside of holding tank (202), spring (401) do not be with the one end difference fixed connection of holding tank (202) contact on the diaphragm of two connecting blocks (4), the equal sliding connection of diaphragm of two connecting blocks (4) is in the inside of holding tank (202).

5. The secondary demolding mechanism of an injection mold according to claim 4, wherein: two shifting chute (402) have all been seted up to the relative one side of connecting block (4), the equal fixedly connected with extension spring (403) in inside of shifting chute (402), extension spring (403) do not have the equal fixedly connected with sliding connection at the inside movable block (404) of shifting chute (402) with the one end of shifting chute (402) contact, equal fixedly connected with stripper plate (405) on the relative one side of two movable blocks (404), reverse buckling groove (406) have all been seted up on the relative one side of two stripper plate (405).

6. The secondary demolding mechanism of an injection mold according to claim 5, wherein: the moving groove (402) and the moving block (404) are both in a transverse T shape, and the lower ends of the demoulding plate (405) and the connecting block (4) are both inclined surfaces.